DEFEATING KASLR BY DOING NOTHING AT ALL

Summary from the TLDR InfoSec newsletter

Kernel Address Space Layout Randomization (KASLR) on Android ARM64 devices can be completely bypassed without any exploits due to the Linux kernel's linear mapping being placed at a predictable virtual address (0xffffff8000000000) and Pixel phones loading the kernel at a static physical address (0x80010000). This allows attackers to calculate exact kernel virtual addresses for any data structure using simple arithmetic, effectively nullifying KASLR's protection against local kernel exploits on affected devices. The vulnerability stems from engineering decisions that prioritize memory hot-plugging support over security randomization, with both the Linux kernel team and Google considering this intended behavior and having no immediate plans for mitigation.